Denial of Service Vulnerability in dnsmasq by Red Hat
CVE-2026-13002

4.4MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
14 August 2026

What is CVE-2026-13002?

A flaw has been detected in the dnssec.c library of the dnsmasq service, which could lead to an infinite loop when processing responses from a DNSSEC-signed zone. An attacker can exploit this vulnerability by sending a specially crafted DNS response, resulting in the dnsmasq process becoming unresponsive. This effectively halts DNS resolution services for clients relying on dnsmasq, disrupting network operations and affecting accessibility.

References

https://access.redhat.com/security/cve/CVE-2026-13002
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2486360
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
4.4
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Lennart Espe for reporting this issue.
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